Cubase Battery Save Crash...

Hi, I’m running Cubase 8.5.20 on an Apple MacBook Pro (OSX El Capitan 10.11.5/16gig RAM) and am having trouble with what I think is Battery 4.15.254 causing Cubase to crash upon saving the project. It would seem that a relatively small amount of processing within Battery is causing the crash and I have tested this theory by saving the Cubase project after the application of each new process (time stretching/envelope/compressor) in Battery and this seems to eventually cause the crash.

Any advice would be very much appreciated,